Road Construction Materials and Construction Technologies
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Road Construction Materials and Construction Technologies Course
Introduction:
While reducing the need for "natural" resources, an inventive roadway sector offers a sizable market for the use of "waste" resources. Previously destined for a landfill, specific waste streams and industrial byproducts are increasingly finding their way into sustainable highway design and maintenance. 'Waste' resources have replaced raw materials in base courses, embankments, concrete, and asphalt pavements. Materials such as reclaimed concrete and asphalt, recycled tires, plastics, steel slag, roofing shingles, coal fly ash, and composted municipal organic wastes have been shown to be reliable, economical, and highly efficient in the construction of roadways. In addition to using only sustainable building materials, other environmentally friendly practices include managing rights of way, repurposing organic materials from grubbing and clearing, demolishing buildings that have been taken out of rights of way, leaving bare minimum right-of-way footprints,
Course Objectives:
The objectives of this program can be summarized in the following main points:
- Enhancing the skills of road construction engineers in their field
- Introduction to road construction materials
- Determination of engineering properties of road materials
- Quality control and quality assurance in road construction
Who Should Attend?
Road construction engineers working in road construction, construction supervision of road projects.
Course Outlines:
An introduction to road construction materials including but not limited to the following:
The used materials for road embankment, road pavement (gravel roads, surface dressed roads, paved roads, etc)
Material properties
Soil and sub base: Standard tests to determine the engineering properties of road materials such as; sieve analysis, liquid limit, plastic limit, plasticity index, soil classification according to AASHTO classification system, standard and modified proctor tests,, California bearing ratio (CBR), modulus of resilient of subgrade soil, relative compaction test, etc.
Base course: Standard tests to determine the engineering properties of road materials such as; sieve analysis, liquid limit, plastic limit, plasticity index, soil classification according to AASHTO classification system, standard and modified proctor tests,, California bearing ratio (CBR), modulus of resilient of subgrade soil, relative compaction test, Los Angeles (abrasion) test, absorption and disintegration test, etc.
Bitumen material:
- Ashalt cement
- Cut back asphalt
- Emulsified asphalt
All standard test on different types of bituminous materials will be illustrated including but not limited to; bitumen grade test, softening point, ductility, solubility of bituminous materials in organic solvents, etc.
Asphalt mixtures: types of asphalt mixtures;
Hot mix asphalt concrete
Worm mix asphalt concrete
Cold mix asphalt concrete
Properties of each mix will be discussed. Also, the components and method of manufacturing will be illustrated
Design of Asphalt concrete mixture:
Testing of materials used in the asphalt mix (course aggregate, fine aggregate, mineral filler, binder etc)
Specification requirements
Blinding of aggregate
Graduation of blinded aggregates
Marshal method for the design of asphalt mixtures; volumetric relationships, optimum bitumen content, tolerance, job mix formula.
- Quality control and quality assurance in road construction:
The importance of quality control in road construction processes
Selecting materials sources
Testing of materials
Inspection of the executed work
Testing the executed work
Filling the test result for the quality assurance process
Quality assurance in road construction processes
- Road construction technology:
Introduction to the new technologies in road construction
New equipment, new techniques used in road construction